package org.smart4j.framework.proxy;


import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.lang.reflect.Method;

/**
 * Created by DP on 2016/11/2.
 * 切面代理
 */
public abstract class AspectProxy  implements  Proxy{

    private static final Logger LOGGER= LoggerFactory.getLogger(AspectProxy.class);

    @Override
    public Object doProxy(ProxyChain proxyChain) throws Throwable {
        Object result=null;

        Class<?> cls=proxyChain.getTargetClass();
        Method method=proxyChain.getTargetMethod();
        Object[] params=proxyChain.getMethodParams();

        begin();

        try{
            if (intercept(cls,method,params)){
                before(cls,method,params);
                result=proxyChain.doProxyChain();
                after(cls,method,params);
            }else {
                result=proxyChain.doProxyChain();
            }
        }catch (Exception e){
            LOGGER.error("proxy failure ",e);
            error(cls,method,params,e);
            throw e;
        }finally {
            end();
        }
        return result;
    }


    public void begin(){}
    public boolean intercept(Class<?> cls,Method method,Object[] params)throws Throwable{
        return true;
    }

    public void before(Class<?> cls,Method method,Object[] params) throws Throwable {}

    public void after(Class<?> cls,Method method,Object[] params) throws Throwable {}

    public void error(Class<?> cls,Method method,Object[] params ,Throwable e){}

    public void end(){}

}
